tools/opt/GraphPrinters.cpp

   1 //===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines several printers for various different types of graphs used
  11 // by the LLVM infrastructure.  It uses the generic graph interface to convert
  12 // the graph into a .dot graph.  These graphs can then be processed with the
  13 // "dot" tool to convert them to postscript or some other suitable format.
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #include "llvm/IR/Dominators.h"
  18 #include "llvm/Pass.h"
  19
  20 using namespace llvm;
  21
  22 //===----------------------------------------------------------------------===//
  23 //                            DomInfoPrinter Pass
  24 //===----------------------------------------------------------------------===//
  25
  26 namespace {
  27   class DomInfoPrinter : public FunctionPass {
  28   public:
  29     static char ID; // Pass identification, replacement for typeid
  30     DomInfoPrinter() : FunctionPass(ID) {}
  31
  32     void getAnalysisUsage(AnalysisUsage &AU) const override {
  33       AU.setPreservesAll();
  34       AU.addRequired<DominatorTreeWrapperPass>();
  35     }
  36
  37     bool runOnFunction(Function &F) override {
  38       getAnalysis<DominatorTreeWrapperPass>().print(dbgs());
  39       return false;
  40     }
  41   };
  42 }
  43
  44 char DomInfoPrinter::ID = 0;
  45 static RegisterPass<DomInfoPrinter>
  46 DIP("print-dom-info", "Dominator Info Printer", true, true);